Electric Motor Bearing Lubrication Best Practices

Electric Motor Bearing Lubrication

Electric motors are the workhorses of industry, and their reliability depends heavily on proper bearing lubrication. Studies indicate that bearing failures account for over 50% of all electric motor failures, with inadequate or improper lubrication being a leading root cause. Selecting the right grease and applying it correctly extends motor life and reduces unplanned downtime.

Key Requirements

Motor bearing greases must provide: (1) Low noise characteristics for quiet operation, (2) Good oxidation stability for extended service at elevated temperatures, (3) Appropriate NLGI consistency for the bearing size and speed, (4) Compatibility with motor bearing materials and seals, and (5) Mechanical stability to resist softening under continuous operation.

Recommended KLÜBER Products

• Kluberspeed BF 72-22: Low-torque synthetic grease designed for electric motor bearings. Excellent noise damping.
• Kluberquiet BQH 72-102: Premium polyurea grease for high-speed motor bearings with outstanding low-noise performance.
• ISOFLEX LDS 18 Special A: Long-life synthetic grease for sealed-for-life motor bearings.
• Kluberplex BEM 41-132: Reliable multi-purpose lithium grease for standard industrial motor bearings.

Relubrication Guidelines

Motor relubrication frequency depends on speed, operating temperature, and environment. NEMA frame motors operating 24/7 at 1800 RPM in clean environments may require relubrication every 6-12 months. High-speed motors (3600 RPM) or motors in contaminated environments need more frequent attention. Use ultrasound or vibration monitoring to optimize intervals.

KOEED Support

Send motor specifications and operating conditions to Moritta@KOEED.COM for KLÜBER product recommendations.